RCE in Anthropic Claude_code
CVE-2025-65099
Claude Code is an agentic coding tool. Prior to version 1.0.39, when running on a machine with Yarn 3.0 or above, Claude Code could have been tricked to execute code contained in a project via yarn plugins before the user accepted the star…
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.005 (39.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Anthropic Claude_code
- Anthropics Claude-code — versions < 1.0.39
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-65099?
- CVE-2025-65099 is a critical-severity vulnerability in Anthropic Claude_code, classified under Code Injection. CVSS score: 9.8/10. Published 2025-11-19.
- How severe is CVE-2025-65099?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2025-65099 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.